TOPIC: Avoid contradictory answers

Have 2 array numbers questions.
First array numbers question asks how many chidren (ages and sex) there are?
Second question asks how many, of these children, (ages and sex) go to school?

based on the totals of the first array numbers question, how can I prevent the totals of the second array numbers question is bigger then the totals of the first one? ..
(hope im being clear and not 2 anoying...)

thanks a lot.

G.

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I want to prevent that totals of "Nº de crianças produtoras de programas escolarizadas" (third question) is greater than totals of "Nº de crianças produtoras de programas" (first question)
(a message appears saying its wrong and cant continue,or something like that..). The survey is group by group.